10021211111 has 2 divisors, whose sum is σ = 10021211112. Its totient is φ = 10021211110.

The previous prime is 10021211107. The next prime is 10021211131. The reversal of 10021211111 is 11111212001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10021211111 - 2² = 10021211107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10021211092 and 10021211101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10021211131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010605555 + 5010605556.

It is an arithmetic number, because the mean of its divisors is an integer number (5010605556).

Almost surely, 2^10021211111 is an apocalyptic number.

10021211111 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021211111 is an equidigital number, since it uses as much as digits as its factorization.

10021211111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 10021211111 its reverse (11111212001), we get a palindrome (21132423112).

The spelling of 10021211111 in words is "ten billion, twenty-one million, two hundred eleven thousand, one hundred eleven".